name: release

on:
  push:
    tags: ['v*']
  workflow_dispatch:
    inputs:
      dry_run:
        description: >-
          Build the repositories with a throwaway key and install from them,
          without publishing anything. This is how the release path gets
          exercised without cutting a tag.
        type: boolean
        default: false

permissions:
  contents: write

jobs:
  deb:
    name: Debian package
    runs-on: ubuntu-latest
    container: debian:stable
    steps:
      - name: Install the build tools
        run: |
          apt-get update -qq
          apt-get install -y --no-install-recommends \
            ca-certificates git make gettext scdoc dpkg-dev

      - uses: actions/checkout@v7

      - name: Check the tag against the Makefile
        run: packaging/check-version.sh "${{ github.ref_name }}"

      - run: packaging/build-deb.sh

      - name: Look inside what was built
        run: |
          dpkg-deb --info dist/*.deb
          dpkg-deb --contents dist/*.deb

      - uses: actions/upload-artifact@v7
        with:
          name: deb
          path: dist/*.deb
          if-no-files-found: error

  rpm:
    name: RPM package
    runs-on: ubuntu-latest
    container: fedora:latest
    steps:
      - name: Install the build tools
        run: |
          dnf install -y --setopt=install_weak_deps=False \
            git make gettext scdoc tar rpm-build rpm-sign systemd-rpm-macros

      - uses: actions/checkout@v7

      - name: Check the tag against the Makefile
        run: packaging/check-version.sh "${{ github.ref_name }}"

      - run: packaging/build-rpm.sh

      # Signed here rather than alongside the APT repository, because this is
      # the one place with a native rpm-sign. A dry run signs with a key it
      # makes on the spot, so the command itself is still exercised.
      - name: Sign the package
        env:
          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
          DRY_RUN: ${{ inputs.dry_run }}
        run: |
          if [ "$DRY_RUN" = "true" ]; then
            gpg --batch --passphrase '' --quick-generate-key \
              'dry run <dry-run@example.invalid>' rsa2048 sign never
          elif [ -n "${GPG_PRIVATE_KEY:-}" ]; then
            printf '%s' "$GPG_PRIVATE_KEY" | gpg --batch --import
          else
            echo "No GPG_PRIVATE_KEY secret; leaving the package unsigned."
            exit 0
          fi
          keyid="$(gpg --list-secret-keys --with-colons | awk -F: '/^sec:/ { print $5; exit }')"
          rpmsign --define "_gpg_name $keyid" --addsign dist/*.rpm
          gpg --armor --export "$keyid" > dist/rpm-signer.asc
          rpm --import dist/rpm-signer.asc
          rpm --checksig dist/*.rpm

      - name: Look inside what was built
        run: |
          rpm -qip dist/*.rpm
          rpm -qlp dist/*.rpm

      - uses: actions/upload-artifact@v7
        with:
          name: rpm
          path: |
            dist/*.rpm
            dist/rpm-signer.asc
          if-no-files-found: error

  publish:
    name: Release and repositories
    needs: [deb, rpm]
    if: startsWith(github.ref, 'refs/tags/v') || inputs.dry_run
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - uses: actions/download-artifact@v8
        with:
          path: incoming
          merge-multiple: true

      - name: Attach the packages to the release
        if: ${{ !inputs.dry_run }}
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh release create "${{ github.ref_name }}" \
            --title "${{ github.ref_name }}" \
            --generate-notes \
            incoming/*.deb incoming/*.rpm \
          || gh release upload "${{ github.ref_name }}" \
            incoming/*.deb incoming/*.rpm --clobber

      - name: Install the repository tools
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y --no-install-recommends \
            dpkg-dev apt-utils createrepo-c

      - name: Get a signing key
        id: key
        env:
          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
          DRY_RUN: ${{ inputs.dry_run }}
        run: |
          if [ "$DRY_RUN" = "true" ]; then
            gpg --batch --passphrase '' --quick-generate-key \
              'dry run <dry-run@example.invalid>' rsa2048 sign never
          elif [ -n "${GPG_PRIVATE_KEY:-}" ]; then
            printf '%s' "$GPG_PRIVATE_KEY" | gpg --batch --import
          else
            echo "present=no" >> "$GITHUB_OUTPUT"
            echo "::warning::No GPG_PRIVATE_KEY secret - the apt and dnf repositories were not updated. The packages are on the release."
            exit 0
          fi
          echo "present=yes" >> "$GITHUB_OUTPUT"

      - name: Check out the published repositories
        if: steps.key.outputs.present == 'yes' && !inputs.dry_run
        uses: actions/checkout@v7
        with:
          ref: gh-pages
          path: pages
        continue-on-error: true

      - name: Update the repositories
        if: steps.key.outputs.present == 'yes'
        run: |
          # First release, or a dry run: there is no branch to start from.
          if [ ! -d pages/.git ]; then
            rm -rf pages && mkdir pages
            git -C pages init -q -b gh-pages
            git -C pages remote add origin "https://github.com/${{ github.repository }}.git"
          fi
          rm -f incoming/rpm-signer.asc
          packaging/publish-repos.sh pages incoming

      - name: Check that what was written can be verified
        if: steps.key.outputs.present == 'yes'
        run: |
          find pages -type f -not -path '*/.git/*' | sort
          echo '--- Release ---'; cat pages/deb/Release
          echo '--- Packages ---'; cat pages/deb/Packages
          gpg --verify pages/deb/InRelease
          gpg --verify pages/deb/Release.gpg pages/deb/Release
          gpg --verify pages/rpm/repodata/repomd.xml.asc pages/rpm/repodata/repomd.xml

      # The proof that the repository works is apt reading it: the signature,
      # the index, the dependencies and the program that comes out the far end.
      - name: Install from the repository that was just built
        if: inputs.dry_run
        run: |
          sudo install -d -m 0755 /etc/apt/keyrings
          sudo gpg --dearmor -o /etc/apt/keyrings/middleclick-autoscroll.gpg < pages/KEY.gpg
          echo "deb [signed-by=/etc/apt/keyrings/middleclick-autoscroll.gpg] file://$PWD/pages/deb ./" \
            | sudo tee /etc/apt/sources.list.d/middleclick-autoscroll.list
          sudo apt-get update
          sudo apt-get install -y middleclick-autoscroll
          middleclick-autoscroll --version
          middleclick-autoscroll list

      - uses: actions/upload-artifact@v7
        if: inputs.dry_run
        with:
          name: pages
          path: pages
          include-hidden-files: true

      - name: Push them
        if: steps.key.outputs.present == 'yes' && !inputs.dry_run
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          cd pages
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git add -A
          git diff --quiet --cached && { echo "nothing changed"; exit 0; }
          git commit -q -m "Publish ${{ github.ref_name }}"
          git push "https://x-access-token:${GH_TOKEN}@github.com/${{ github.repository }}.git" HEAD:gh-pages

  verify-dnf:
    name: Install from the RPM repository
    needs: publish
    if: inputs.dry_run
    runs-on: ubuntu-latest
    container: fedora:latest
    steps:
      - uses: actions/download-artifact@v8
        with:
          name: pages
          path: pages

      # A real run signs the package and the repository metadata with the one
      # key from the secret. A dry run has no secret, so each job made a key of
      # its own and both public halves are needed to check both signatures.
      - uses: actions/download-artifact@v8
        with:
          name: rpm
          path: signer

      - name: Install from the repository that was just built
        run: |
          rpm --import pages/KEY.gpg
          rpm --import signer/rpm-signer.asc
          cat > /etc/yum.repos.d/middleclick-autoscroll.repo <<EOF
          [middleclick-autoscroll]
          name=middleclick-autoscroll
          baseurl=file://$PWD/pages/rpm
          enabled=1
          gpgcheck=1
          repo_gpgcheck=1
          gpgkey=file://$PWD/pages/KEY.gpg
          EOF
          # util-linux is for runuser below; the base image does not carry it,
          # and util-linux-core is not the half that has it.
          dnf install -y middleclick-autoscroll util-linux

          # As somebody, not as root: running it as root is refused, which is
          # the point of it, and a container is root by default.
          useradd -m tester
          runuser -u tester -- middleclick-autoscroll --version
          runuser -u tester -- middleclick-autoscroll list